archbrix said:
zarx said: Stopped watching when he started comparing clock rates of GPUs of different architectures, he clearly doesn't know what he is talking about. Still think the Wii U should be 2 as powerful as the 360 overall, but this video was just stupid |
You really should watch the entire video so that we can hear more opinions pertaining to his CPU comparisons as well.
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Ok so his CPU comparison is better than his face palm inducing GPU comparison, but he makes some assumptions that are not necessarily correct.
He uses the current spec ranges for power7 CPUs, which would be fine if the architectue hadn't only been used in high end supercomputers and servers. As they are those specifications are virtually meaningless to whatever chip ends up in the Wii U.
Just because they have only gone down to 2.4GHz and 4MB of L3 per core in a server enviroment doesn't mean that IBM couldn't make a chip that was clocked at 1GHz with no L3 for example (not that I think Nintendo would go with such a chip), also the solid sources just say a multi-core Power7 (IBM press release) with rumours that have mentioned 3 and 4 core CPUs so we don't really know, tho there seem to be more quad core (3GHz) lately, but Nintendo may reserve a core for the OS.
Also the 4 SMT feature doesnt really mean that you can execute 4 threads per core at once, it just means the pipeline can hold 4 "thread states", it can still only execute one thread per cycle per core. Where it does come into effect is if a thread is stalled (happens when the thread is waiting for information, usally from memory as it can take several cycles of CPU time to access cache, even more to access L3 cache and a lot more to access main RAM ) it can execute the next thread in the que instead of just ideling. It improves performance but only in instances where you have more threads than you have cores, most games today usally use 2-4 threads at once so only most game engines wouldn't see any advantage in performance (tho highly threaded engines are starting to appear), and it might be worth cutting the feature in a console (in a server enviroment it is a very valuable feature) CPU as it adds complexity to the CPU for what might be a very small or non existant performance gain for games.
Oh and a bonus I stumbled on this http://www.amd.com/us/products/embedded/graphics-processors/Pages/ati-radeon-e4690.aspx R700 bassed embedded GPU, probably a closer comparison to what will be in the Wii U than a desktop GPU, likely clocked up and hopefully with GDDR5 instead of 3 and with a nice chunck of eDRAM. It's low wattage and already designed for embedded solutions.